The remaining part of nmount/omount/rootfs mount changes. I cannot sensibly

split the conversion of the remaining three filesystems out from the root
mounting changes, so in one go:

cd9660:
	Convert to nmount.
	Add omount compat shims.
	Remove dedicated rootfs mounting code.
	Use vfs_mountedfrom()
	Rely on vfs_mount.c calling VFS_STATFS()

nfs(client):
	Convert to nmount (the simple way, mount_nfs(8) is still necessary).
	Add omount compat shims.
	Drop COMPAT_PRELITE2 mount arg compatibility.

ffs:
	Convert to nmount.
	Add omount compat shims.
	Remove dedicated rootfs mounting code.
	Use vfs_mountedfrom()
	Rely on vfs_mount.c calling VFS_STATFS()

Remove vfs_omount() method, all filesystems are now converted.

Remove MNTK_WANTRDWR, handling RO/RW conversions is a filesystem
task, and they all do it now.

Change rootmounting to use DEVFS trampoline:

vfs_mount.c:
	Mount devfs on /.  Devfs needs no 'from' so this is clean.
	symlink /dev to /.  This makes it possible to lookup /dev/foo.
	Mount "real" root filesystem on /.
	Surgically move the devfs mountpoint from under the real root
	filesystem onto /dev in the real root filesystem.

Remove now unnecessary getdiskbyname().

kern_init.c:
	Don't do devfs mounting and rootvnode assignment here, it was
	already handled by vfs_mount.c.

Remove now unused bdevvp(), addaliasu() and addalias().  Put the
few necessary lines in devfs where they belong.  This eliminates the
second-last source of bogo vnodes, leaving only the lemming-syncer.

Remove rootdev variable, it doesn't give meaning in a global context and
was not trustworth anyway.  Correct information is provided by
statfs(/).

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/kern/vfs_init.c b/sys/kern/vfs_init.c
index da365d4..8ce79d3 100644
--- a/sys/kern/vfs_init.c
+++ b/sys/kern/vfs_init.c
@@ -216,8 +216,8 @@ vfs_register(struct vfsconf *vfc)
 	 * Check the mount and unmount operations.
 	 */
 	vfsops = vfc->vfc_vfsops;
-	KASSERT(vfsops->vfs_mount != NULL || vfsops->vfs_omount != NULL,
-	    ("Filesystem %s has no (o)mount op", vfc->vfc_name));
+	KASSERT(vfsops->vfs_mount != NULL,
+	    ("Filesystem %s has no mount op", vfc->vfc_name));
 	KASSERT(vfsops->vfs_unmount != NULL,
 	    ("Filesystem %s has no unmount op", vfc->vfc_name));